Select the incorrect statement for vexillary or papilionaceous aestivation ?

Options

A. Two lateral petals are found which are termed as wing.
B. The standard petal is posterior .
C. The largest petal is anterior and overlaps wing .
D. Two smallest anterior petals are present known as keel.

Answer

To solve the question regarding the incorrect statement for vexillary or papilionaceous aestivation, we will analyze the structure and arrangement of petals in this type of flower.

### Step-by-Step Solution:

1. **Understanding Vexillary Aestivation**:
- Vexillary or papilionaceous aestivation is a specific arrangement of petals found in the family Fabaceae (legumes). It consists of five petals: one standard petal, two lateral petals (wings), and two smaller anterior petals (keel).

2. **Identifying the Petal Arrangement**:
- The **standard petal** is the largest and is located at the posterior end of the flower.
- The **two lateral petals** are known as the wings and are positioned laterally. They overlap the two smallest petals.
- The **two smallest petals** are called the keel and are located at the anterior end of the flower.

3. **Evaluating the Statements**:
- **Option 1**: "Two lateral petals are found which are termed as wing."
- This statement is correct.
- **Option 2**: "The standard petal is posterior."
- This statement is also correct.
- **Option 3**: "Largest petal is anterior and overlaps wing."
- This statement is incorrect because the largest petal (the standard) is posterior, not anterior.
- **Option 4**: "Two smallest anterior petals are present and known as heel."
- This statement is correct.

4. **Conclusion**:
- The only incorrect statement among the options provided is **Option 3**: "Largest petal is anterior and overlaps wing."

### Final Answer:
The incorrect statement for vexillary or papilionaceous aestivation is **Option 3**.

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